Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
ludwig457
Group Title
Find the area of an equilateral triangle with side of length 18. (Round your answer to one decimal place.)
 one year ago
 one year ago
ludwig457 Group Title
Find the area of an equilateral triangle with side of length 18. (Round your answer to one decimal place.)
 one year ago
 one year ago

This Question is Closed

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
Area= 1/2 base x height tan(60)=h/18 h=18tan(60) right?
 one year ago

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
should i be using law of sines
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
why use law of sines?
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
wait...by law of sines do you mean \[\frac{a}{\sin A} = \frac b{\sin B} = \frac c{\sin C}\]
 one year ago

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
yes, i have three angles (60) and three sides) so the how would i then find the height
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
use pythagorean theorem...you have equilateral triangle dw:1352707222314:dw
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
so the height would cut your triangle into two equal parts..dw:1352707262694:dw can you see how to get the height now?
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
now use your 1/2 bh
 one year ago

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
A=(1/2)(18)15.6)
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
by the way.. you can also use your solution a while ago... 18tan (60) you don't need law of sines...just use a calculator for that
 one year ago

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
140.4units squared
 one year ago

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
and that solution from earlier would then give me the height?
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
hmm wait...something's wrong with it...let me find it first
 one year ago

ludwig457 Group TitleBest ResponseYou've already chosen the best response.1
should it be 9 instead of 18
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
yes it should be 9
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.